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Old Town-CS100505 (8/2/2010) Keith Marvin - Re: Fwd: Old Town Coppell - Proposed Storm DrainPage 1 From: George Marshall To:Keith Marvin; Michael Garza Date: 5/5/2010 3:27 PM Subject: Re: Fwd: Old Town Coppell - Proposed Storm Drain I would agree with what she is proposing to do. It makes sense in the long run. George Marshall, PE City of Coppell Engineering 972-304-3562 >>> Keith Marvin 5/5/2010 1:54 PM >>> Do either of you have any thoughts on this? Keith >>> Tricia Hatley <thh@freese.com> 5/5/2010 9:54 AM >>> Keith, I don't have George's email so if you'd rather I work with him on this, just pass it along to him for me. We prepared a rough cost estimate for the two storm drain options we have been considering. One would be to do some temporary measures to avoid putting the storm drain lines in Bethel and the second option is to construct the pieces of SD in Bethel that we need per the overall drainage plan. * The costs for the first option are about $320k and the second is about $327k for just SD pipe and manholes. But the second option has about $40k worth of improvements that are needed for the Bethel project anyway so it is really the most economical solution. * Attached is a layout for the second option. I'm not sending a plan for the first option as we are having all kinds of trouble getting it to really work. * Without constructing the lines in Bethel, we are forcing runoff to go to outfall points that are different than all of the design and planning work that has been completed for this area. * We also have trouble dealing with the existing conditions out on Bethel as there really isn't a good storm drain system in place for the existing roadway. The interim between Old Town and Bethel improvements will be a little messy if we don't get those lines in the ground now. * We are still working on the details of the connections and layout, so don't worry too much about how the lines are drawn on this sketch. * We are still looking at the parallel system for Hammond. We understand your concerns with the connection at the gabion wall and we know that this is an expense that was really planned for in the conceptual design. We will have some of our storm water folks look at it today to see if they can help us come up with some alternatives that might be more economical and more palatable. So, after all the discussion and spending a few days of looking really closely at all the issues, we recommend the option that is shown in the attachment. With this plan, we are able to match the drainage areas that have been planned for in previous work and make the outfall connections per those plans. We have lots of details to work out on how to make this happen with all of the utility conflicts out there and how to deal with the interim drainage on Bethel. Please let me know if you have any questions or concerns about this. Otherwise, we will proceed with the design shown in the attachment and provide all the details for your review on the 60% plans that will be submitted May 25. Thanks for your time on this. Trish Trish Hatley (8/2/2010) Keith Marvin - Re: Fwd: Old Town Coppell - Proposed Storm DrainPage 2 Freese and Nichols, Inc. ________________________________ This electronic mail message is intended exclusively for the individual or entity to which it is addressed. This message, together with any attachment, may contain the sender's organization's confidential and privileged information. The recipient is hereby notified to treat the information as confidential and privileged and to not disclose or use the information except as authorized by sender's organization. Any unauthorized review, printing, retention, copying, disclosure, distribution, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this message in error, please immediately contact the sender by reply email and delete all copies of the material from any computer. Thank you for your cooperation. Page 1 of 1 Keith Marvin -Old Town Coppell - Proposed Storm Drain From: Tricia Hatley <thh @freese.com> To: Keith Marvin <kmarvin @coppelltx.gov> Date: 5/5/2010 10:01 AM Subject: Old Town Coppell - Proposed Storm Drain Attachments: Old Town Coppell Proposed Storm Layout.pdf Keith, I don't have George's email so if you'd rather I work with him on this, just pass it along to him for me. We prepared a rough cost estimate for the two storm drain options we have been considering. One would be to do some temporary measures to avoid putting the storm drain lines in Bethel and the second option is to construct the pieces of SD in Bethel that we need per the overall drainage plan. • The costs for the first option are about $320k and the second is about $327k for just SD pipe and manholes. But the second option has about $40k worth of improvements that are needed for the Bethel project anyway so it is really the most economical solution. • Attached is a layout for the second option. I'm not sending a plan for the first option as we are having all kinds of trouble getting it to really work. • Without constructing the lines in Bethel, we are forcing runoff to go to outfall points that are different than all of the design and planning work that has been completed for this area. • We also have trouble dealing with the existing conditions out on Bethel as there really isn't a good storm drain system in place for the existing roadway. The interim between Old Town and Bethel improvements will be a little messy if we don't get those lines in the ground now. • We are still working on the details of the connections and layout, so don't worry too much about how the lines are drawn on this sketch. • We are still looking at the parallel system for Hammond. We understand your concerns with the connection at the gabion wall and we know that this is an expense that was really planned for in the conceptual design. We will have some of our storm water folks look at it today to see if they can help us come up with some alternatives that might be more economical and more palatable. So, after all the discussion and spending a few days of looking really closely at all the issues, we recommend the option that is shown in the attachment. With this plan, we are able to match the drainage areas that have been planned for in previous work and make the outfall connections per those plans. We have lots of details to work out on how to make this happen with all of the utility conflicts out there and how to deal with the interim drainage on Bethel. Please let me know if you have any questions or concerns about this. Otherwise, we will proceed with the design shown in the attachment and provide all the details for your review on the 60% plans that will be submitted May 25. Thanks for your time on this. Trish Trish Hatley Freese and Nichols, Inc. This electronic mail message is intended exclusively for the individual or entity to which it is addressed. This message, together with any attachment, may contain the sender's organization's confidential and privileged information. The recipient is hereby notified to treat the information as confidential and privileged and to not disclose or use the information except as authorized by sender's organization. Any unauthorized review, printing, retention, copying, disclosure, distribution, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this message in error, please immediately contact the sender by reply email and delete all copies of the material from any computer. Thank you for your cooperation. file: HC: \Documents and Settings \radloo \Local Settings\ Temp \XPgrpwise \4BE141E7City_of... 8/2/2010 --